Gardiner, T. (2016). Teaching mathematics at secondary level. Open Book Publishers.
Chicago-referens (17:e uppl.)Gardiner, Tony. Teaching Mathematics at Secondary Level. Cambridge, UK: Open Book Publishers, 2016.
MLA-referens (9:e uppl.)Gardiner, Tony. Teaching Mathematics at Secondary Level. Open Book Publishers, 2016.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.